2018 Fall Meeting

Presentation information

Oral presentation

V. Nuclear Fuel Cycle and Nuclear Materials » 504-3 Fuel Reprocessing

[3J03-07] Improvement of Safety at Reprocessing Plant

Fri. Sep 7, 2018 10:35 AM - 12:00 PM Room J (A41 -A Building)

Chair:TSUYOSHI MURAKAMI(CRIEPI)

11:35 AM - 11:50 AM

[3J07] Study on ruthenium volatilization during evaporation and dryness of nitrate solution

Reduction of formation of volatile ruthenium tetroxide by sucrose addition

*Tetsuya Kato1, Tsuyoshi Usami1, Takeshi Tsukada1 (1. CRIEPI)

Keywords:High level liquid waste, Ruthenium, Volatilization, Loss of coolant function

In a cooling malfunction accident of a high-level liquid waste (HLLW) tank, part of radioactive ruthenium (Ru) is potentially released to the environment as volatile RuO4. In this study, sucrose was added as reductant into a simulated HLLW containing Ru, and the gases of RuO4, NOx and CO2 evolved during the dryness and denitration up to 1073 K were measured by means of the mass spectrometer and the FT-IR.